I had the USA-SPEC DF-GM installed, which yields (2) RCA inputs.
I have the stock 6-CD BOSE System with XM.
Gotcha: I could not use the "AUX" functionality, I access the device by going to XM1, then using SEEK. The device actually shows up as an external CD Changer. Disk 1 Track 1 is AUX1, Disk 1 Track 2 is AUX2.
I was also able to re-purpose my roof XM antenna:
The Envoy XM module is located right under the glove compartment.
- Pull the panel under the glove compartment (2 hex screws), and you have direct access.
- The Antenna connection is in a brown plastic connector. Disconnect the antenna from the XM unit
- (Optional) Remove the Plastic connector. To do this, you will see a white clip, use an eyeglass flat screwdriver to remove it. After the white clip is removed, the standard SMB antenna connection will pull right out.
(If anyone needs pictures, let me know and I will post.)
(links are not commercials, just a reference, many sites carry these items, you just have to look around!)
My next project will be to add a cigarette lighter (or "auxiliary power", whatever they're calling it these days) that turns on and off with the truck.
Has anyone done this?